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# AE & JE EE Quiz: Electrical Machine booster Quiz 3

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Question 1

A 3ϕ, 50 Hz, 4 pole alternator has a star connected winding with 72 slots and 12 turn per slot. The flux per pole is 0.05wb. The Generated per phase emf is (kd = 0.956)

Question 2

The front and cross-sectional view of simple loop alternator is shown in figure. the direction of emf at the instant shown would be

Conductor 2  3  5  6

Question 3

A synchronous generator, connected to an infinite bus is working at half load. If an increase in its field current causes a reduction in the armature current, then the generator is ___________.

Question 4

A synchronous generator connected to infinite bus is supplying half of the maximum power which is 1 pu. Then synchronizing power coefficient is

Question 5

The second-harmonic component of the power P versus load angle δ characteristic of a synchronous machine, operating at a terminal voltage Vt and having the d- and q-axis reactance per phase of Xd and Xq, respectively, is

Question 6

A 6-pole three phase alternator is running is speed of 800 rpm. It is supplying power to a 4-pole three phase induction motor having full load slip of 2%. The speed of rotor field with respect to rotor structure at full load is:

Question 7

A Doubly excited salient pole motor will have

Question 8

The purpose of starting winding in a single-phase induction motor is to?

Question 9

If the capacitor of a single phase motor is short circuited, the motor will _____.

Question 10

Reduction in the capacitance of a capacitor-start motor results in reduced_________.
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